LOINC Code 11991-7: Fetal Abdomen Mean perimeter Estimated from gestational age

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Perimeter.mean. It is commonly used with the system or sample type Abdomen^Fetus.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Observation
• Method: Estimated from gestational age

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Fetal Abdomen Mean perimeter Estimated from gestational age
• Perimeter.mean
• See Table II this reference for variance
• Abd; Abd^Fetus; Abd+Fetus; Abdo; Abdomen+; Abdominal; Abdominal circumference; Abdominal circumference from gestational age; AC; AC by GA; AC(GA); Average; Avg; Circum; Circumference; Est; Est from GA; estimation; Fetal; Gest; Gestation; Gyn; Gynecology; Length; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; predicted; Prenatal; QNT; Quan; Quant; Quantitative; Random

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions